Display shelf



FIG. 1 is a perspective view of a display shelf showing my new design;

FIG. 2 is a left side elevation thereof; the opposite side being the same in appearance as the side shown;

FIG. 3 is a front elevation thereof;

FIG. 4 is a rear elevation thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a display shelf, as shown and described. 